The size of this trampoline is 5.1m long x 3.0m wide, it is 1.05m high when open and 2.185m when closed

What difference does the size of web bed make?

The smaller the webbing size the more responsive the bed, so the 6mm bed is suitable for competition whereas the 25mm bed is more suitable for schools and institutional use. The 13mm is the popular pick amongst clubs and schools as it is the intermediate option, making it an ideal pick for practice/training.